    body {
        margin: 0;
        padding: 30px;
        background-image: url(../images/bg.png);

        height: 20000px;
    }

    div {
        margin: 10px;
        /* background: tomato; */
        border-radius: 5px;
    }
    div img {
        border-radius: 5px;
    }
    a {
        text-decoration: none;
        color: #1d1d1f;
        /* color:tomato; */
    }
    a:hover{
        color: tomato;
    }
/* 字体声明 */
@font-face {
    font-family: 'HarmonyOS Sans SC Light';
    src: url('../fonts/HarmonyOS Sans SC Light.ttf?tomleg') format('truetype');
    font-family: 'HarmonyOS Sans SC Black';
    src: url('../fonts/HarmonyOS Sans SC Black.ttf?tomleg') format('truetype');
    font-family: 'HarmonyOS Sans SC Bold';
    src: url('../fonts/HarmonyOS Sans SC Bold.ttf?tomleg') format('truetype');
    font-family: 'HarmonyOS Sans SC Medium';
    src: url('../fonts/HarmonyOS Sans SC Medium.ttf?tomleg') format('truetype');
    font-family: 'HarmonyOS Sans SC Regular';
    src: url('../fonts/HarmonyOS Sans SC Regular.ttf?tomleg') format('truetype');
    font-family: 'HarmonyOS Sans SC Thin';
    src: url('../fonts/HarmonyOS Sans SC Thin.ttf?tomleg') format('truetype');
    font-weight: normal;
    font-style: normal;
    font-display: block;
}
    
    
    .note {
        margin: 0 auto;
        padding: 0;
        width: 1080px;
        /* background-color: tomato; */
    }     


    .style_1 {
        font-family: youyuan;
        font-size: 50px;
        text-align: center;
        margin-top: 20px;
    }

    .style_2 {
        font-size: 22px;
        /* font-family: Aa回眸一眼就心动 \(非商业使用\); */
        font-family: 'HarmonyOS Sans SC Light';
    }

    .style_3 {
        font-family: 等线;
        font-size: 22px;
    }
    .style_4 {
        position: relative;
    }
    .style_5 {
        position: absolute;
        left: 0;
        top: 0;
    }
    .style_6 {
        font-weight: 500;
    } 
    .style_7 {
        font-size: 35px;
    }
    .style_8 {
        background-color:lime;
    }
    .diyi {
        position: absolute;
        left: 410px;
        top: 0;
        margin: 0;
        width: 600px;
        height: 651px;
        border: 1px solid #1d1d1f;
        /* background-color: teal; */
    }
    .diyi div {
        font-size: 20px;
    }
    .yiye {
        border: 1px solid #1d1d1f;
    }
    .dibu {
        position:fixed;
        top: 30px;
        left: 0;
    }
    .dibu img {
        width: 45px;
        transform: rotate(180deg);
    }
    .bulu {
        color: #0f59a4;
        font-weight: 500;
        /* color: #2775b6; */
    }
    .math {
        position: absolute;
        top: -10px;
        left: 605px;
        width: 420px;
        height: 180px;
        line-height: 29px;
        border: 1px solid #1d1d1f;
    }
    .math div {
        margin: 0;
        padding: 0;
        padding-left: 20px;
        font-size: 18px;
    }
    .Array {
        position: absolute;
        top: -10px;
        left: 360px;
        /* width: 720px; */
        height: 130px;
        line-height: 30px;
        border: 1px solid #1d1d1f;
    }
    .function {
        position: absolute;
        top: -10px;
        left: 620px;
        width: 300px;
        height: 635px;
        text-align: center;
        font-family: 'HarmonyOS Sans SC Bold';
        border: 1px solid tomato;
    }
    .function p {
        margin: 20px;
        font-size: 40px;
    }
    .function:hover{
        color: #0f59a4;
        border: 1px solid #0f59a4;
    }
   .huojian {
       margin-left: -40px;
       width: 40px;

   }
   .huojian img {
       width: 100%;
   }